Exonumia Queen Victoria & Elizabeth II medal 1867 -1967 Canada Confederation

I received this small 21 mm copper medal today. I have not found another, but have found a slightly larger version and one dollar size of different composition. It is a commemorative medal or token for the centennial 1867 -1967 Canada Confederation
with busts of Queen Victoria & Elizabeth II.

Can anyone tell me anything about the value, mintage or rarity and origin of this well made small item.




I thought it was a nice addition to other medals I have collected to add to my Canada copper collection.
Here are my other Royal visit to Canada medals. http://www.cointalk.com/members/thenickelguy/albums/thenickelguy-exonumia/